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Took off the throttle body intake tube and had a little bit of oil in it and also in the hose running over to the AOS. Not enough to be smoking or anything, but enough to dirty up a towel. Wondering if an aos starting to go bad could cause the rpm to fluctuate at cruising speeds. Also thinking about taking off the resonance tube while I am in here and clean it. Anything to look for with it that could cause an rpm fluctuation or vacuum leak? Trying to cover all the bases while I have it apart.
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